Remove Show impl from PostgresNotification

src/lib/lib.rs

@@ -277,7 +277,6 @@ impl PostgresNoticeHandler for DefaultNoticeHandler {
 }
 
 /// An asynchronous notification
-#[deriving(Show)]
 pub struct PostgresNotification {
     /// The process ID of the notifying backend process
     pub pid: i32,

src/test/test.rs

@@ -906,7 +906,7 @@ fn test_notification_iterator_some() {
                 assert_eq!(&expected.channel, &channel);
                 assert_eq!(&expected.payload, &payload);
             }
-            x => fail!("Expected {} but got {}", expected, x)
+            None => fail!("Unexpected result")
         }
     }